<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!-- 登录表单区域 -->
      <el-form ref="loginFormRef" class="login_form" :rules="loginFormRules" :model="loginForm">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-yonghu
"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input type="password" v-model="loginForm.password" prefix-icon="iconfont icon-mima"></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  data(){
    return {
      // 这是登录表单的数据绑定对象
      loginForm:{
        username:'admin',
        password:'123456'
      },
      // 这是表单远验证规则对象
      loginFormRules:{
        // 验证用户名是否合法
        username:[
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password:[
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods:{
    //点击充值按钮
    resetLoginForm(){
      this.$refs.loginFormRef.resetFields();
    },
    login(){
      this.$refs.loginFormRef.validate(async(valid)=>{
        if(!valid)return;
        const {data:res}=await this.$http.post('login',this.loginForm);
        if(res.meta.status!==200)return this.$message.error('登录失败')
        this.$message.success('登陆成功');
        // 1.将登陆成功后的token,保存到客户端的sessionStorage中
        // 1.1项目中出了登录之外的其他API借口，必须在登录之后才能访问
        // 1.2token只应在当前网站打开期间生效，所有将token保存在sessionStorage中
        window.sessionStorage.setItem("token",res.data.token);
        // 2.通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push("/home");
      })
    }
  }
}
</script>
<style scoped>
  .login_container{
    background-color: #2b4b6b;
    height:100%;
  }
  .login_box{
    width:450px;
    height:300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left:50%;
    top:50%;
    transform: translate(-50%,-50%);
  }
  .avatar_box{
    height:130px;
    width:130px;
    border:1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left:50%;
    transform: translate(-50%,-50%);
    background-color: #fff;
  }
  img{
    width:100%;
    height:100%;
    border-radius: 50%;
    background-color: #eee;
  }
  .btns{
    display: flex;
    justify-content: flex-end;
  }
  .login_form{
    position: absolute;
    bottom:0;
    width:100%;
    padding :0 20px;
    box-sizing: border-box;
  }
</style>